DCA/DTA encoder

1 files changed, 544 insertions, 0 deletions

diff --git a/libavcodec/dcaenc.h b/libavcodec/dcaenc.h
new file mode 100644
index 0000000..63d03dc
--- /dev/null
+++ b/libavcodec/dcaenc.h
@@ -0,0 +1,544 @@
+/*
+ * DCA encoder tables
+ * Copyright (C) 2008 Alexander E. Patrakov
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_DCAENC_H
+#define AVCODEC_DCAENC_H
+
+/* This is a scaled version of the response of the reference decoder to
+   this vector of subband samples: ( 1.0 0.0 0.0 ... 0.0 )
+   */
+
+static const int32_t UnQMF[512] = {
+    7,
+    4,
+    -961,
+    -2844,
+    -8024,
+    -18978,
+    -32081,
+    -15635,
+    -16582,
+    -18359,
+    -17180,
+    -14868,
+    -11664,
+    -8051,
+    -4477,
+    -1327,
+    -1670,
+    -6019,
+    -11590,
+    -18030,
+    -24762,
+    -30965,
+    -35947,
+    -36145,
+    -37223,
+    -86311,
+    -57024,
+    -27215,
+    -11274,
+    -4684,
+    42,
+    108,
+    188,
+    250,
+    -1007,
+    -596,
+    -2289,
+    -12218,
+    -27191,
+    -124367,
+    -184256,
+    -250538,
+    -323499,
+    -397784,
+    -468855,
+    -532072,
+    -583000,
+    -618041,
+    -777916,
+    -783868,
+    -765968,
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+    -662468,
+    -583058,
+    -490548,
+    -401623,
+    -296090,
+    -73154,
+    -36711,
+    -7766,
+    -2363,
+    -4905,
+    2388,
+    2681,
+    5651,
+    4086,
+    71110,
+    139742,
+    188067,
+    151237,
+    101355,
+    309917,
+    343690,
+    358839,
+    357555,
+    334606,
+    289625,
+    224152,
+    142063,
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+    399634888,
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+    1527740502,
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+    1622301248,
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+    1449,
+    420,
+    785,
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+    -42988,
+    -35272,
+    -63735,
+    -33501,
+    -12671,
+    -4038,
+    -1232,
+    5,
+    7
+};
+
+#endif /* AVCODEC_DCAENC_H */